[chefrc]

Hello Everyone
I am at a stand point with my newly built cnc machine. I am a chef by trade and i do ice carvings. The request for corporate logos ar becoming a hugh demand. But by hand its becoming a high pain in the ....... So i did a research on doing a pantograh that lead me to building a cnc. after 2 years of research and building it up and running. i am using long motors nema 34 with it full kit design breaker board, power supplies etc.. My table is or my cutting table will have x axe 44 inch of travel and my y axe will have 24 inch travel and my z axe will have 12 inch travel up and down. Its is all built out of aluminium and stainless steel and wired with sub zero wiring because it will be installed in the freezer running at -5. so all wiring has to be flexible.
I have mach 3 software up and running. i have been watching videos for the las two weeks, printing all the info i can find on motor tuning limit switches. With always the same end result.
I have set the motor for correct pins. they are running. All axes have been tested for correct distance they are moving with precisioni have 3 limit switches set up on the ned of each axe that are connect together on a always closed. they are working when i click one of them they are light up corectly in the diagnostic page.
My home switch are wired individualy to there own pin. I did the auto test for pin numbers and they are all testing correct. i click them and they light up correctly in the diagnostic mage.
So when i jog and hit either limit or home they stop the machine. So to this point my motors are traveling the correct distance in mm on all axes.
So i am at the reference all stage. to zero my axes.
When i ask reference all its starts by the z axes for some reason travels up like it should and then hits the homes switch but does not stop i have to hit esc or reset to stop it before damage arrives. but when i jog maually the home switches are trigered and the machine stops fine.
where should i start looking or what step should i do to zero my axes

[rockcliff]

From what you describe, it could be (Home Negative Setting) Config, Homing/Limits

[ger21]

Are you using a parallel port, or motion controller?
Which version of Mach3? If you're using the latest version, 3.043.066, then go back to 3.043.062 and see if it helps.

[chefrc]

i am using paralell port but also is a demo version fully usable can you rell all with a demo version

[chefrc]

i will verify the version i have and try that thanks but is a demo version fully fonctionnal and can you ref all with a demo version

[ger21]

Yes, you can ref all with the demo version.

[chefrc]

Ok
i am using the 3.043.066, I bought the licence and still cant ref all.
So here goes what i am using for settings
Ports and pins: 0x378 for the parralel port and 25000 hz speed ( nothing else is checked

Motor output:
Axe / Enabled / step pin # / Dir pin # / Dir low / Step low / stepport / dir port
x yes 2 3 yes yes 1 1
y yes 4 5 yes yes 1 1
z yes 6 7 yes yes 1 1

Input signal:
Signal enable Port pin number active low emulated hot keys
X++ checked 1 12 checked
X-- checked 1 13 checked
X home checked 1 13 checked
Y ++ checked 1 12 checked
Y-- checked 1 10 checked
Y home checked 1 10 checked
Z++ checked 1 12 checked
Z-- checked 1 15 checked
z home checked 1 15 checked

e stop checked 1 11 checked



Encoder : Nothing checked
spindle setup : nothing setup
Mill options: advanced compensation analyses checked ( nothing else)


motor tuning: have set it up and checks accuracy this is working fine .


General config:
Attachment 313326

hot keys:
Attachment 313328


Home and limit switch:

Axes Reversed soft max soft minimum slow zone home off home neg auto zero speed
X checked 1010 mm 0.0 1 0.0 unchecked checked 20%
Y checked 530 mm 0.0 1 0.0 unchecked checked 20%
Z checked 0.0 mm -310 mm 1 0.0 checked checked 20%

Under G28 cordinates ( nothing is entered


Global setting:
Safe z setup :
safeZ DRO is in machine coordinates( checked)

In function CFG'S i didnot touch that

Under Program run ( alt 1)
Everything seems normal. But when i press soft limits under status the message machine out limit for soft limit activation.


Under settings ( alt 6)
Auto limit auto ride is checked


Under diagnostic ( alt 7)
everything seem fine the home switches light up individualy
and the limit switch light up all tree due to they are all together on one pin


Please advise if you see anything wrong i have read manual and cant see what is wrong

[rockcliff]

Sometimes it's best to try and setup one axis at a time, it could be one or more axis's are conflicting with the Z,

Normally we use only one input pin for homing all axis's the switches should be all for Normally Closed (NC) position
, you should also use a small home off amount to make sure the switch is returned back to NC after the homing

[ger21]

As I said earlier, try changing to version 3.043.062 and see if it helps.